CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
Copyright
Harris Corporation 1994
1
S E M I C O N D U C T O R
CD54AC240/3A
CD54ACT240/3A
Octal Buffer/Line Driver
Three-State, Inverting
Functional Diagram
18
16
14
12
7
3
5
9
2
2OE
1OE
1
19
6
1Y0
1Y1
1Y2
1Y3
2Y0
2Y1
2Y2
2Y3
17
4
8
11
13
15
1A0
1A1
1A2
1A3
2A0
2A1
2A2
2A3
V
CC
= 20
GND = 10
Description
The CD54AC240/3A and CD54ACT240/3A are three-state
octal buffer/line drivers that utilize the Harris Advanced
CMOS Logic technology. These devices have active-LOW
output enables (1OE, 2OE)
The CD54AC240/3A and CD54ACT240/3A are supplied in
20 lead dual-in-line ceramic packages (F suffix).
ACT INPUT LOAD TABLE
INPUT
UNIT LOAD (NOTE 1)
nA0 - A3
1.42
1OE
0.83
2OE
0.83
NOTE:
1. Unit load is
I
CC
limit specified in DC Electrical Specifications
Table, e.g., 2.4mA Max at +25
o
C.
June 1997
File Number
3898
Absolute Maximum Ratings
DC Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6V
DC Input Diode Current, I
IK
For V
I
< -0.5V or V
I
> V
CC
+ 0.5V
. . . . . . . . . . . . . . . . . . . . . .
20mA
DC Output Diode Current, I
OK
For V
O
< -0.5V or V
O
> V
CC
+ 0.5V
. . . . . . . . . . . . . . . . . . . . .
50mA
DC Output Source or Sink Current, Per Output Pin, I
O
For V
O
> -0.5V or V
O
< V
CC
+ 0.5V
. . . . . . . . . . . . . . . . . . . . .
50mA
DC V
CC
or GND Current, I
CC
or I
GND
For Up to 4 Outputs Per Device, Add
25mA For Each
Additional Output
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100mA
Power Dissipation Per Package, P
D
T
A
= -55
o
C to +100
o
C (Package F) . . . . . . . . . . . . . . . . . . 500mW
T
A
= +100
o
C to +125
o
C (Package F) . . . . . . . . Derate Linearly at
8mW/
o
C to 300mW
Operating Temperature Range, T
A
Package Type F . . . . . . . . . . . . . . . . . . . . . . . . . . -55
o
C to +125
o
C
Storage Temperature, T
STG
. . . . . . . . . . . . . . . . . . -65
o
C to +150
o
C
Lead Temperature (During Soldering)
At Distance 1/16in.
1/32in. (1.59mm
0.79mm)
From Case For 10s Max . . . . . . . . . . . . . . . . . . . . . . . . . . +265
o
C
Unit Inserted Into a PC Board (Min Thickness 1/16in., 1.59mm)
With Solder Contacting Lead Tips Only. . . . . . . . . . . . . . . +300
o
C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Recommended Operating Conditions
Supply Voltage Range, V
CC
Unless Otherwise Specified, All Voltages Referenced to GND
T
A
= Full Package Temperature Range
CD54AC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5V to 5.5V
CD54ACT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V
DC Input or Output Voltage, V
I
, V
O
. . . . . . . . . . . . . . . . . . 0V to V
CC
Operating Temperature, T
A
. . . . . . . . . . . . . . . . . . . -55
o
C to +125
o
C
Input Rise and Fall Slew Rate, dt/dv
at 1.5V to 3V (AC Types) . . . . . . . . . . . . . . . . . . . 0ns/V to 50ns/V
at 3.6V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 20ns/V
at 4.5V to 5.5V (AC Types) . . . . . . . . . . . . . . . . . 0ns/V to 10ns/V
COMING SOON!
COMPLETE DATA SHEET
PDF 
ZIP